This study investigates the efficiency of carbon capture in air combustion and oxyfuel combustion processes using monoethanolamine (MEA) as the absorbent. Five different flue gases from various industrial sources are analyzed, including gas-fired power plants, coal-fired power plants, combined heat and power plants, aluminum production, and cement manufacturing. The results show that oxyfuel combustion requires significantly less energy for carbon capture, especially at high removal rates (over 90%), with energy savings up to 84%. This is attributed to the higher concentration of CO₂ in oxyfuel combustion flue gases, which increases the driving force for mass transfer, reducing the need for absorbent and energy. Additionally, oxyfuel combustion produces no nitrogen oxides, offering environmental benefits. The study also highlights that oxyfuel combustion can achieve 100% carbon capture, with the same amount of CO₂ captured as from fossil combustion. The use of clean oxygen with added CO₂ as an inert gas replaces nitrogen in air combustion, enhancing the efficiency of carbon capture. The findings suggest that oxyfuel combustion is a more efficient and environmentally friendly method for carbon capture compared to traditional air combustion technologies. The study concludes that oxyfuel combustion offers significant advantages in terms of energy efficiency, lower absorbent requirements, and reduced greenhouse gas emissions.This study investigates the efficiency of carbon capture in air combustion and oxyfuel combustion processes using monoethanolamine (MEA) as the absorbent. Five different flue gases from various industrial sources are analyzed, including gas-fired power plants, coal-fired power plants, combined heat and power plants, aluminum production, and cement manufacturing. The results show that oxyfuel combustion requires significantly less energy for carbon capture, especially at high removal rates (over 90%), with energy savings up to 84%. This is attributed to the higher concentration of CO₂ in oxyfuel combustion flue gases, which increases the driving force for mass transfer, reducing the need for absorbent and energy. Additionally, oxyfuel combustion produces no nitrogen oxides, offering environmental benefits. The study also highlights that oxyfuel combustion can achieve 100% carbon capture, with the same amount of CO₂ captured as from fossil combustion. The use of clean oxygen with added CO₂ as an inert gas replaces nitrogen in air combustion, enhancing the efficiency of carbon capture. The findings suggest that oxyfuel combustion is a more efficient and environmentally friendly method for carbon capture compared to traditional air combustion technologies. The study concludes that oxyfuel combustion offers significant advantages in terms of energy efficiency, lower absorbent requirements, and reduced greenhouse gas emissions.